HEAT RATE IMPROVEMENT IN THERMAL POWER PLANT

HEAT RATE

Heat rate is heat input required per unit of power generated(kcal/kWh), for specific fuel conditions and specific site conditions.

LOSSES

Throttle PressureThrottle TemperatureHot Reheat TemperatureCondenser PressureMakeup FlowFeedwater Heater Drain Cooler Approach Temperature

Main Steam Desuperheater Spray FlowReheat Desuperheater Spray FlowAuxiliary Electrical LoadsDry Gas LossCarbon Loss

PARAMETERS TO BE OBSERVED

Steam Temperatures a) Final Superheat outlet temperature b) Hot Reheat outlet temperatureAttemperation Flows a) Reheat b) SuperheatFW temperature at economizer outlet

1. BOILER-WATER/STEAM SIDE

2. Boiler - Fire SideFlue gas temperaturesPrimary air header pressureFurnace draftWind box to furnace differentialFlue gas oxygen percentage rise across APH.

Burner tilt positionSoot blowing steam usage

Mill outlet temperaturesRatio of mill amps to coal flowTempering air

3. PULVERIZER

Terminal Temperature DifferencesDrain Cooler ApproachesFeed water temperature at HPH outletHeater levelHeater vent positions

4. FEED WATER TEMPERATURE

Recirculation V/V passing

4. BOILER FEED PUMP

Number of leaking valvesSoot blower availability by areaMakeup water flowSteam flow to auxiliary equipment

6. OTHERS

ROAD BLOCKSROAD BLOCKS

Flexibility in scheduling of LRSBProvision of remote Wall blowing from UCBRegular checks on Locking of peep holesLeakage in steam traps

Recommendations

SHARP INCREASE IN THE QUALITY OF COAL*